package io.renren.common.utils;

import com.xiaoleilu.hutool.util.NumberUtil;

public class NumberUtils {
	public static Double mul(double... val) {
		if (val.length < 2) {
			return val[0];
		}
		Double result = NumberUtil.mul(val[0], val[1]);

		for (int i = 2; i < val.length; i++) {
			if (val != null) {
				result = NumberUtil.mul(result, val[i]);
			}
		}
		return result;

	}

	public static Double add(double... val) {
		if (val.length < 2) {
			return val[0];
		}
		Double result = NumberUtil.add(val[0], val[1]);

		for (int i = 2; i < val.length; i++) {
			if (val != null) {
				result = NumberUtil.add(result, val[i]);
			}
		}
		return result;

	}

	/**
	 * 数字金额大写转换，思想先写个完整的然后将如零拾替换成零 要用到正则表达式
	 */
	public static String digitUppercase(double n) {
		String fraction[] = { "角", "分" };
		String digit[] = { "零", "壹", "贰", "叁", "肆", "伍", "陆", "柒", "捌", "玖" };
		String unit[][] = { { "元", "万", "亿" }, { "", "拾", "佰", "仟" } };

		String head = n < 0 ? "负" : "";
		n = Math.abs(n);

		String s = "";
		for (int i = 0; i < fraction.length; i++) {
			s += (digit[(int) (Math.floor(n * 10 * Math.pow(10, i)) % 10)] + fraction[i]).replaceAll("(零.)+", "");
		}
		if (s.length() < 1) {
			s = "整";
		}
		int integerPart = (int) Math.floor(n);

		for (int i = 0; i < unit[0].length && integerPart > 0; i++) {
			String p = "";
			for (int j = 0; j < unit[1].length && n > 0; j++) {
				p = digit[integerPart % 10] + unit[1][j] + p;
				integerPart = integerPart / 10;
			}
			s = p.replaceAll("(零.)*零$", "").replaceAll("^$", "零") + unit[0][i] + s;
		}
		return head + s.replaceAll("(零.)*零元", "元").replaceFirst("(零.)+", "").replaceAll("(零.)+", "零").replaceAll("^整$",
				"零元整");
	}

}
